American Society of Heating and Ventilating Engineers- Guide,- 1929 The rate structures of many gas companies are so devised that addi tional uses of gas, such as. hot-water supply, restaurant use and incinera tion are charged for at preferential rates if the main load is for building heating. 246 Chapter xv HEAT INSULATION FOR PIPES AND SURFACES (Joiosulftted Surfaces, Cold Surfaces, Hot Water and Steam Lines, Effective Air Velocity, Economic Thickness.

American Society 0/ Heating and Ventilating Engineers Guide, 1929 Vent to Atmosphere Run to Air above Roof" 1blind Nipple- ` Overflow Pump Control Valve hOramY^' unobstructed Sham toBoilerFeedPumf JobaiterFeedPump, Discharge from Pump to Tank Steam to ^.Vacuum Pump Globe Valve G/obe^1 Valve Lubricator', Globe lhive' BaiterFeedPump r ui .

American Society of Heating and Ventilating Engineers Guide, 1929 ture improvement.

American Society of Heating and Ventilating Engineers Guide, 1929 harmful, there is general agreement that very high or very low humidities indoors are to be avoided.

American Society of Heating and Ventilating Engineers Guide, 1929 Thus, no matter what the wind's direction, there will always be some openings directly exposed to the pressure force of the wind, and others to a suction force, and effective movement through the building assured.

Hoffman Specialty Co., Inc.

Temperature Control Johnson Service Company Milwaukee, Wis.

American Society of Heating and Ventilating Engineers Guide, 1930 Fig. 6.

American Society of Heating and Ventilating Engineers Guide, 1930 Types of Air Washers AIR WASHERS Air washers are arranged to bring the air into contact with a large water area: (1) by passing it through a fine spray; (2) by passing it over wet surfaces; (3) by passing it both through a spray and over wet surfaces.

American Society of Heating and Ventilating Engineers Guide, 1930 Table 7.

American Society of Heating and Ventilating Engineers Guide, 1930 On large installations, however, it may generally be assumed that welding is less costly than threading.

American Society of Heating and Ventilating Engineers Guide, 1930 HORSE POWER OF MOTORS .

American Society of Heating and Ventilating Engineers Guide, 1930 The following should be kept in mind in laying out any type of system: 1.

American Society of Heating and Ventilating Engineers Guide, 1930 CAPACITY OF RETURNS WITH VARIOUS GRADES In general return lines when installed follow the contour of the land, and Table 3 gives sizes of return pipes for various grades.

American Society of Heating and Ventilating Engineers Guide, 1931 10.